[Bug] rt_vsnprintf格式化long long数值错误

RT-Thread Version

all

Hardware Type/Architectures

all

Develop Toolchain

Other

Describe the bug

rt_vsnprintf_tiny.c 中rt_vsnprintf函数格式化long long数值错误，主要原因是print_number中将 'l' 与 'L'合并处理了

        switch (qualifier)
        {
        case 'h':
            if ((rt_int16_t)num < 0)
            {
                sign = '-';
                num = (rt_uint16_t)-num;
            }
            break;
        case 'L':
        case 'l':
            if ((long)num < 0)
            {
                sign = '-';
                num = (unsigned long)-num;
            }
            break;

使用以下代码测出结果不同

rt_kprintf("rt_kprintf: INT32_MIN = %lld\n", (int64_t)INT32_MIN);
printf("printf: INT32_MIN = %lld\n", (int64_t)INT32_MIN);
rt_kprintf("rt_kprintf: UINT32_MAX = %lld\n", (int64_t)UINT32_MAX);
printf("printf: UINT32_MAX = %lld\n", (int64_t)UINT32_MAX);
rt_kprintf("rt_kprintf: INT64_MIN = %lld\n", (int64_t)INT64_MIN);
printf("printf: INT64_MIN = %lld\n", (int64_t)INT64_MIN);
rt_kprintf("rt_kprintf: INT64_MAX = %lld\n", (int64_t)INT64_MAX);
printf("printf: INT64_MAX = %lld\n", (int64_t)INT64_MAX);

测试结果

rt_kprintf: INT32_MIN = -2147483648
printf: INT32_MIN = -2147483648
rt_kprintf: UINT32_MAX = -1
printf: UINT32_MAX = 4294967295
rt_kprintf: INT64_MIN = 9223372036854775808
printf: INT64_MIN = -9223372036854775808
rt_kprintf: INT64_MAX = -1
printf: INT64_MAX = 9223372036854775807

Other additional context

No response

Start in rt_vsnprintf_tiny.c at rt_vsnprintf and print_number, focusing on how the 'l' and 'L' qualifiers handle signed and unsigned values. Run the provided INT32 and INT64 formatting cases and compare rt_kprintf with printf. Done means the reported long long values match the expected printf output.